Review Detail of The_Priest in Heaven Extinction Martial Emperor

Why does every story have to be a revenge story? Why does every protagonist have to transmigrate into a useless young master? Why does he always have to join a sect (or a sect equivalent, such as an academy)? Why is there always a tournament arc? Why does every single MC have one of the same three blueprint personalities that run through every single novel on this site (coward, arrogant or ignorant aka dumb as rocks, or a combination of them)? It's so boringly predictable.